Car-brake



(No Model.)

A. P. MASSEY.

GAB BRAKE.

No. 413,452. Patented Oct. 22. 1889;

INVENTOH:

WITNESSES:

u PETERS. Phbwum pw, Washington a. a

" UNITED STATES PATENT OFFICE.

ALBERT P. MASSEY, OF WATERTOVVN, NEW YORK.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 413,452, dated October 22, 1889.

Application filed August 5, 1889. serialNo. 319,826- (No model.) I

To all whom it may concern.-

Be it known that I, ALBERT P. MASSEY, a citizen of the United States,- residing in the city of Watertown, in the county of J efierson and State of New York, have invented certain new and useful Improvements in Car- Brakes, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to car-brakes in which the momentum of a moving car is utilized for applying the brakes.

Figure 1 is a View of the apparatus transverse to a car-axle. Fig. 2 is a sectional view parallel with the axle.

In patent granted to me August 20, 1889, No. 409,328, I have described a similar invention, of which this is an improvement.

In the drawings, 1 is a car-axle. 2 is a disk with a case-hardened face clamped to said axle. 3 is a collar also clamped to said axle. 4. is a sleeve turning freely on said axle and kept in position by the disk 2 and collar 3. This sleeve has an arm 5 extending upward from it.

6 and 7 are links which connect arm 5 with the bolster of a car-truck and maintain the arm in a vertical position over the axle.

8 is a grooved pulley for winding a chain. It is free to turn or slide on sleeve 4., and has one face filled with wires 9, like a brush.

10 10 are levers with fulcrums at 11 11. The lower ends of these levers 12 12 have a bearing against the pulley 8, whereby the brush 9 on the pulley may be pressed into contact with the disk 2. Levers 1O 10 are connected by cross=bar 13, so that they act in unison. Rod 1e connects this with bell-crank 15 and 16.

17--is an idle-pulley for changing the direction of chain 18, which is connected at one end with pulley 8 and at the other with any system of levers for applying the brakes. Chain 16 may be connected with any continuous system for actuating brakes. The connection with the bolster is such that the sleeve 4. is free to partake of every motion of the axle except torevolve with it.

The operation is as follows: When the caraxle is in motion, the disk 2 revolves with it;

but the sleeve 4 is restrained from revolving by links 6 and 7, which connect it to the bolster. The sleeve 4 therefore forms a stationary bearing for the pulley 8, and the springs on the brake-beams keep a tension on chain 18 suflicient to keep the chain unwound from pulley 8. If a tension is put on chain 16 and bell crank 15, it will cause levers 10 to press pulley 8 and brush 9 against the revolving disk 2. This will cause pulley 8 to revolve until the tension on chain 18 is .as great as the friction between the brush and the disk. As the pressure of the brush on the disk is controlled by the tension on the chain 16, it is obvious that the tension on the chain 18 will be in proportion to the tension on the chain 16, and the pressure on the brake-blocks may therefore be varied by varying the tension on chain 16. When the tension on 16 is released, there will be no friction between brush and disk, and the springs on the brake-beams will unwind the chain. 18 from pulley 8.

The pulley 8 is located on a sleeve surrounding the axle, so that there may be no tendency to wind up the chain 18, except when the brush is pressed into contact with the disk.

In my patent, mentioned above, I have described the advantages of a wire brush for producing continued resistance and the use of a sliding-chain barrel in connection therewith.

I have also applied for Letters Patent on this same date for the above-described apparatus in connection with an air-cylinder.

What I claim as novel, and desire to secure by Letters Patent, is-.

1. In a car-brake, a sleeve on the axle with a projecting arm connected to the car-frame so that it cannot revolve, a pulley with a frictional face turning loosely on said sleeve, and

a friction-disk clamped to the axle, in combisaid pulley in contact with said disk, substanto this specification, in the presence of two subtially as set forth.

3. In a car-brake, the combination of bellcrank 15, rod 14, and levers 10 with pulley 8, 5 sleeve 4, disk 2, and axle 1, substantially as set forth.

In testimony whereof I have signed my name scribing witnesses, on this 2d day of August, A. D. 1889.

ALBERT P. MASSEY. Witnesses:

H. W. BOYER, MICHAEL J. MORKIN. 

